diff --git a/lib/core/settings.py b/lib/core/settings.py
index 10512145e..cb52bdee3 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.0.10.50"
+VERSION = "1.0.10.51"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index e05587871..405ef4958 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -45,7 +45,7 @@ e60456db5380840a586654344003d4e6  lib/core/readlineng.py
 5ef56abb8671c2ca6ceecb208258e360  lib/core/replication.py
 99a2b496b9d5b546b335653ca801153f  lib/core/revision.py
 7c15dd2777af4dac2c89cab6df17462e  lib/core/session.py
-7864a0a7a9bf001653a6c5642854258f  lib/core/settings.py
+1704cd24d6a18570392afba5e901c136  lib/core/settings.py
 7af83e4f18cab6dff5e67840eb65be80  lib/core/shell.py
 23657cd7d924e3c6d225719865855827  lib/core/subprocessng.py
 c3ace7874a536d801f308cf1fd03df99  lib/core/target.py
@@ -437,16 +437,16 @@ b5ea5375df444e0240f1ee0e2a8e52fb  waf/trafficshield.py
 3bcac085dcd9ed26b50a2320e418e9f3  waf/yundun.py
 2a57f322f0b6e7b11b8df0909816a34f  waf/yunsuo.py
 2d53fdaca0d7b42edad5192661248d76  xml/banner/cookie.xml
-37603bc0905af0c65480a2ca959990ec  xml/banner/generic.xml
+e87d59af23b7b18cd56c9883e5f02d5c  xml/banner/generic.xml
 d8925c034263bf1b83e7d8e1c78eec57  xml/banner/mssql.xml
 c97c383b560cd578f74c5e4d88c88ed2  xml/banner/mysql.xml
 9b262a617b06af56b1267987d694bf6f  xml/banner/oracle.xml
-0d1c881156b760492d8004bd0d926c63  xml/banner/postgresql.xml
+d90fe5a47b95dff3eb1797764c9db6c5  xml/banner/postgresql.xml
 b07b5c47c751787e136650ded060197f  xml/banner/server.xml
-e5d141fb2ba31e4eae3495554b538908  xml/banner/servlet.xml
+d48c971769c6131e35bd52d2315a8d58  xml/banner/servlet.xml
 d989813ee377252bca2103cea524c06b  xml/banner/sharepoint.xml
 350605448f049cd982554123a75f11e1  xml/banner/x-aspnet-version.xml
-2394458d582a636c52342cff33ae3035  xml/banner/x-powered-by.xml
+817078783e1edaa492773d3b34d8eef0  xml/banner/x-powered-by.xml
 fb93505ef0ab3b4a20900f3e5625260d  xml/boundaries.xml
 535d625cff8418bdc086ab4e1bbf5135  xml/errors.xml
 a279656ea3fcb85c727249b02f828383  xml/livetests.xml
diff --git a/xml/banner/generic.xml b/xml/banner/generic.xml
index 244cee49e..eb97b1d88 100644
--- a/xml/banner/generic.xml
+++ b/xml/banner/generic.xml
@@ -115,7 +115,7 @@
         <info type="Linux" distrib="Mandriva"/>
     </regexp>
 
-    <regexp value="Red[\-\_\ ]*Hat">
+    <regexp value="Red[\-\_\ ]?Hat">
         <info type="Linux" distrib="Red Hat"/>
     </regexp>
 
@@ -147,7 +147,7 @@
 
     <!-- Mac OSX -->
 
-    <regexp value="Mac[\-\_\ ]*OSX">
+    <regexp value="Mac[\-\_\ ]?OSX">
         <info type="Mac OSX"/>
     </regexp>
 
diff --git a/xml/banner/postgresql.xml b/xml/banner/postgresql.xml
index 3ae42c3a3..4c64844d7 100644
--- a/xml/banner/postgresql.xml
+++ b/xml/banner/postgresql.xml
@@ -15,11 +15,11 @@
     </regexp>
 
     <!-- Ubuntu -->
-    <regexp value="PostgreSQL\s+(8\.2\.7)\s+on\s+.*?\s+\(Ubuntu 4\.2\.3-2ubuntu4\)">
+    <regexp value="PostgreSQL\s+(8\.2\.7)\s+on.*?\(Ubuntu 4\.2\.3-2ubuntu4\)">
         <info dbms_version="1" type="Linux" distrib="Ubuntu" release="8.04" codename="Hardy Heron"/>
     </regexp>
 
-    <regexp value="PostgreSQL\s+(8\.3\.5)\s+on\s+.*?\s+\(Ubuntu 4\.3\.2-1ubuntu11\)">
+    <regexp value="PostgreSQL\s+(8\.3\.5)\s+on.*?\(Ubuntu 4\.3\.2-1ubuntu11\)">
         <info dbms_version="1" type="Linux" distrib="Ubuntu" release="8.10" codename="Intrepid Ibex"/>
     </regexp>
 </root>
diff --git a/xml/banner/servlet.xml b/xml/banner/servlet.xml
index 75106859d..403f14359 100644
--- a/xml/banner/servlet.xml
+++ b/xml/banner/servlet.xml
@@ -3,7 +3,7 @@
 <!-- Reference: http://www.http-stats.com/Servlet-Engine -->
 
 <root>
-    <regexp value="Tomcat( Web Server)*\/([\d\.]+)">
+    <regexp value="Tomcat( Web Server)?\/([\d\.]+)">
         <info technology="Tomcat" tech_version="1"/>
     </regexp>
 
diff --git a/xml/banner/x-powered-by.xml b/xml/banner/x-powered-by.xml
index 0ca885459..633a35e5c 100644
--- a/xml/banner/x-powered-by.xml
+++ b/xml/banner/x-powered-by.xml
@@ -19,11 +19,11 @@
         <info technology="ASP.NET" type="Windows"/>
     </regexp>
 
-    <regexp value="(JBoss|Tomcat)[\-\_\/\ ]*([\d\.]+)">
+    <regexp value="(JBoss|Tomcat)[\-\_\/\ ]?([\d\.]+)">
         <info technology="Tomcat" tech_version="2"/>
     </regexp>
 
-    <regexp value="Servlet[\-\_\/\ ]*([\d\.]+)">
+    <regexp value="Servlet[\-\_\/\ ]?([\d\.]+)">
         <info technology="Servlet" tech_version="1"/>
     </regexp>
 </root>